CN203813724U - Double-glass photovoltaic battery module and frame thereof - Google Patents

Abstract

The utility model discloses a double-glass photovoltaic battery module and a frame thereof. The frame is an integral one formed by bending a packaging strip. The frame forms a framework structure. The cross section of the frame has a U-shaped groove. The frame provided by the utility model has a groove which can wrap the outer edges of a body. In this way, when the edges or the four corners of the battery module are impacted by external force, a first glass layer and a second glass layer of the body can be prevented to the maximum from being smashed. The battery module is thus protected. Transportation is facilitated. A long service lifetime is further achieved. Furthermore, the frame with a simple structure is low in cost.

Description

Double glass photovoltaic cell module and its frame

technical field

The utility model relates to the field of solar cells, in particular to a frame for a double-glass photovoltaic cell assembly and a double-glass photovoltaic cell assembly with the frame.

Background technique

As a clean energy power generation device, solar cell modules have been widely used all over the world. Currently the most commonly used photovoltaic module structure is a laminated part after laminating glass, EVA packaging film, battery sheet, and polymer material backplane, and then the laminated part is installed in an aluminum frame (as shown in Figure 13). Then according to needs, several pieces of aluminum frames inlaid with battery panels are integrated into a frame, and the frame is fixed on a support to form a completed solar cell array. At this time, the firmness of the solar cell array depends critically on the aluminum frame structure that is fixed and directly in contact with the solar panel. The existing aluminum frame structure can basically meet the installation requirements.

The aluminum frame structure of conventional components consumes a large amount of aluminum material, the cost is high, and special equipment is required for installation, which makes the process complicated. Aluminum frames of this structure are also difficult to use on double-glass components.

In addition, the double-glass structural components currently on the market are generally frameless, acrylic tape framed, or directly protected with silicone.

Whether the double-glass module has no frame or uses acrylic tape to protect the frame, it cannot protect the module well. Since the upper and lower layers are tempered glass, when an external force hits the edge or four corners of the module, the module is easily broken, which will give The packaging, transportation, installation and use of components pose significant risks. Therefore, it is necessary to design a structure to provide the best protection for double glass components. At present, some institutions have developed structural silicone to protect the edge of the component, but the process is very complicated and the consistency is poor.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a frame for a double-glass photovoltaic cell assembly, which makes the cell assembly easy to transport and reliable to protect.

Another object of the present utility model is to provide a double-glass photovoltaic cell assembly with the frame.

According to the embodiment of the first aspect of the utility model, a frame for a double-glass photovoltaic cell module, the frame is an integral frame formed by bending a sealing strip, the frame is formed as a frame structure, and the horizontal The section has a U-shaped groove.

According to the frame of the present invention, there is a shaped groove that can cover the outer edge of the main body, so that when an external force impacts the edge or four corners of the battery assembly, it can prevent the first glass layer and the second glass layer of the main body from being damaged to the greatest extent. The battery assembly is protected by being crushed, which is convenient for transportation and has a long service life. In addition, according to the frame of the present invention, the structure is simple and the cost is low.

A double-glass photovoltaic cell assembly according to the second aspect of the present invention includes: a body, the body includes a first glass layer, a first encapsulation layer, a cell group layer, a second encapsulation layer, And the second glass layer; according to the frame according to the embodiment of the first aspect of the present invention, the frame encapsulates the outer edge of the body, and the width of the U-shaped groove of the frame is greater than the thickness of the body by at least over the outer edge of the body.

According to the double-glass photovoltaic cell assembly of the present invention, by setting the end sealing block, it makes up for the deficiency that the edge of the traditional photovoltaic assembly exposes the packaging material to the outside, and combines the dense first glass layer and the second glass layer of the upper and lower layers. A good barrier to water vapor and corrosive gases in the environment from entering the interior of the module slows down the attenuation of the module and prolongs the life of the module; by setting a reflective coating, the light passing through the gap between the cells can be reflected back to reduce packaging loss; by setting the frame, When an external force strikes the edge or four corners of the battery assembly, the first glass layer and the second glass layer of the main body can be prevented from being smashed to the greatest extent, thereby protecting the battery assembly, which is convenient for transportation and has a long service life. In addition, the bus bar can be effectively led out from the edge of the body through the frame.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a cross-sectional view of a double-glass photovoltaic cell assembly according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the double-glass photovoltaic cell assembly shown in Fig. 1;

Fig. 3 is a schematic cross-sectional view of the frame of the double-glass photovoltaic cell module shown in Fig. 1;

Fig. 4 is an expanded schematic diagram of the frame in Fig. 2;

Fig. 5 is a schematic diagram of the light reflection of the backplane layer in the double-glass photovoltaic cell module shown in Fig. 1;

Fig. 6 is a schematic diagram of a junction box in a double-glass photovoltaic cell assembly according to an embodiment of the present invention;

7a and 7b are top and bottom views of the junction box shown in FIG. 1;

Fig. 8 is a schematic diagram of a double-glass photovoltaic cell assembly according to another embodiment of the present invention;

Figure 9 is a partial enlarged view of the double-glass photovoltaic cell assembly shown in Figure 8, showing the assembly of diodes and junction boxes;

Fig. 10 is a schematic diagram of respectively leading out positive and negative junction boxes in the double-glass photovoltaic cell assembly shown in Fig. 9;

Figure 11 is a side view from direction A in Figure 10;

Fig. 12 is a partial schematic view of the second glass layer in the double-glass photovoltaic cell assembly shown in Fig. 9, wherein the containing groove is shown;

Fig. 13 is a schematic frame view of a conventional battery assembly.

Reference signs:

Ontology 1;

The first glass layer 11; the first liquid silicone encapsulation layer 12; the battery sheet group layer 13; the bus bar 131;

The second liquid silicone packaging layer 14; the second glass layer 15; the containing groove 16;

reflective coating 2; end seal block 3;

junction box 4;

First embodiment:

Box 41a; Chamber 40a; Sub-chambers 401a, 402a and 403a;

Wire hole 411a; separator 42a; conductive block 43a; diode 44a;

Connector 45a; Cable 46a;

Second embodiment:

Box body 41b; chamber 410b; threading hole 411b; conductive sheet 42b;

Connector 43b; Cable 44b;

Fixture 5;

Frame 6; Notch 60; U-shaped groove 61; Raised strip 62; V-shaped groove 63; Grounding hole 64;

Sealant 7; Packaging Connector 8; Chip Diode 9

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In describing the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "inner", "outer" etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

A double-glass photovoltaic cell assembly according to an embodiment of the present utility model will be briefly described below with reference to FIGS. 1-12 .

The double-glass photovoltaic cell assembly according to the present invention includes: a body 1 , a reflective coating 2 , an end sealing block 3 , a frame 6 and a junction box 4 .

As shown in FIG. 1 , the body 1 includes a first glass layer 11 , a first encapsulation layer 12 , a battery sheet group layer 13 , a second encapsulation layer 14 , and a second glass layer 15 which are sequentially stacked in sequence. The outer edges of the glass layer 11 and the second glass layer 15 exceed the outer edges of the first encapsulation layer 12 , the cell stack layer 13 and the second encapsulation layer 14 . Optionally, the first glass layer 11 can be ordinary low-iron ultra-clear embossed tempered glass or coated low-iron ultra-clear embossed tempered glass, and the second glass layer 15 can be ordinary low-iron ultra-clear embossed tempered glass or ordinary tempered glass. Glass. By adopting the first glass layer 11 and the second glass layer 15, the strength of the body 1 is improved, and the load-bearing capacity of the body 1 is improved. Because glass has super weather resistance, aging resistance, insulation performance and fire resistance, its wear resistance is also much higher than that of polymer backplanes. The use of glass as the back plate can well enhance the aging resistance of the battery assembly, and the pressure resistance and fire resistance of the double-glass photovoltaic battery assembly according to the utility model are also improved accordingly.

The reflective coating 2 is provided on the side surface of the second glass layer 15 facing the battery sheet group layer 13 (the lower surface as shown in FIG. 1 and FIG. 5 ). Optionally, the reflective coating 2 is in the form of a flat network, and the first glass layer 11 is frosted glass.

The end sealing block 3 is disposed between the first glass layer 11 and the second glass layer 15 , and the end sealing block 3 is located on the outer periphery of the first encapsulation layer 12 /the cell stack layer 13 /the second encapsulation layer 14 . Specifically, the double-glass photovoltaic cell assembly is made by laminating the first glass layer 11 , the first encapsulation layer 12 , the battery sheet group layer 13 , the second encapsulation layer 14 , the second glass layer 15 and the end sealing block 3 . Wherein, the symbol "/" used in the description of the present application means "and".

The frame 6 is encapsulated on the outer periphery of the body 1 by a sealant. The frame 6 has a notch 60, the junction box 4 is arranged at the notch 60, the junction box 4 is sealed with the body 1 and the frame 6, and the battery pack layer 13 draws a bus bar 131 from between the first glass layer 11 and the second glass layer 15 , the junction box 4 is electrically connected to the bus bar 131 to extract the energy of the battery slices.

According to the double-glass photovoltaic cell assembly of the present invention, by setting the end sealing block, it makes up for the deficiency that the edge of the traditional photovoltaic assembly exposes the packaging material to the outside, and combines the dense first glass layer and the second glass layer of the upper and lower layers. A good barrier to water vapor and corrosive gases in the environment from entering the interior of the module slows down the attenuation of the module and prolongs the life of the module; by setting a reflective coating, the light passing through the gap between the cells can be reflected back to reduce packaging loss; by setting the frame, When an external force strikes the edge or four corners of the battery assembly, the first glass layer 11 and the second glass layer 15 of the body 1 can be avoided to the greatest extent from being smashed, thereby protecting the battery assembly, facilitating transportation and having a long service life. In addition, the bus bar 131 can be effectively led out from the edge of the body through the frame 6 .

The frame 6 according to the embodiment of the present utility model will be specifically described below with reference to FIGS. 1-4 . The frame 6 is an integral frame 6 formed by bending a packaging strip. The frame 6 is formed into a frame structure, and the cross section of the frame 6 has a U-shaped groove. The width of the notch of the U-shaped groove is greater than the thickness of the body 1 to cover the on the outer edge. Optionally, the frame 6 can be fixed on the outside of the outer edge of the main body 1 by silicone, butyl rubber or double-sided adhesive tape.

Optionally, the thickness of the frame 6 is 1-2 mm, that is, the thickness of each side of the U-shaped groove of the frame 6 is 1-2 mm. In some embodiments, a convex strip 62 is formed on the outer surface of the frame 6 , as shown in FIG. 3 . Optionally, the raised strip 62 extends along the length direction of the frame 6 . Further, the protruding strip 62 extends in a straight line or a curve along the length direction of the frame 6 , for example, it may also extend in a spiral. By providing the raised lines, the overall strength of the frame 6 can be increased, and the appearance of the frame 6 can be made more beautiful.

Optionally, the frame 6 can only encapsulate the three sides of the body 1, and of course only a small part can be encapsulated on the fourth side, that is, it may not be a complete frame structure, that is to say, the gap is formed in the middle of the frame 6, so that to install the junction box. Specifically, the packaging strip is a continuous conductor, wherein the packaging strip has at least two predetermined bending positions, a 90-degree V-shaped groove 63 is formed at each predetermined bending position, and a grounding hole 64 is provided on the packaging strip. The reason for using a continuous frame conductor is that if each section of the frame conductor is discontinuous, each section of the side of the battery assembly needs to be grounded during installation, which increases the cost and makes installation difficult. Preferably, the diameter of the ground hole 64 is 2-4mm. In addition, by forming three 90-degree V-shaped grooves 63 on the packaging strip at predetermined right angles, it can be directly bent and formed during installation, so that the bent 90-degree V-shaped grooves 63 just form the corners of the frame.

When the frame 6 and the connector 4 are both insulating polymer material parts, there is no need to open a ground hole 64 and a plurality of V-shaped grooves 63 on the frame 6, but directly cut out the required size segments for installation, that is, the frame 6 is connected with connector 4 in sequence.

According to the frame of the present invention, there is a U-shaped groove that can cover the outer edge of the main body 1, so that when an external force impacts the edge or four corners of the battery assembly, the first glass layer 11 and the second glass layer 11 of the main body 1 can be avoided to the greatest extent. The second glass layer 15 is smashed, thereby protecting the battery assembly, which is convenient for transportation and has a long service life. In addition, the frame according to the utility model has a simple structure and low cost.

The following describes the double-glass photovoltaic cell assembly with the above-mentioned frame.

According to some embodiments of the present utility model, as shown in FIG. 5 , the cross-section of the reflective coating 2 is formed into a substantially triangular shape with an apex angle of a circular arc, and the reflective coating 2 corresponds to the adjacent cells in the cell group layer 13. The gap between, and/or the position of the cell edge is set. Thus, referring to FIG. 5 , the light entering the cell gap from the first glass layer 11 is reflected on the triangular reflective coating 2 with circular arc chamfering, and the reflected light enters the first glass layer 11 and continues to be reflected to Utilization on the battery chip, which further improves the utilization rate of photons and improves the output power of the battery module. In addition, in the lamination process, the triangular reflective coating 2 with arc chamfering will not cause damage to the edge of the battery sheet and the encapsulation film, and can fit well in the battery assembly, increasing the safety and mechanical strength of the battery assembly. Stability and extended service life.

Preferably, the reflective layer arranged corresponding to the gap between adjacent battery sheets in the battery sheet group layer 13 and/or the edge position of the battery sheet forms an integrated network board structure,

Optionally, the arc of the apex angle of the triangle formed by the cross-section of the reflective coating 2 is Π/6-5Π/6. Further, the arc of the apex angle of the triangle is Π/4-Π/2. More preferably, the arc of the apex angle of the triangle is Π/3. Optionally, the base angle α of the triangle formed by the cross-section of the reflective coating 2 is 15-85 degrees. Further, the base angle α of the triangle is 30-70 degrees. More preferably, the base angle α of the triangle is 60 degrees. Those skilled in the art can understand that the radian of the apex angle and the angle of the base angle of the above-mentioned triangle can be used in any combination.

In some embodiments, the reflective coating 2 is a white organic polymer layer, including but not limited to a fluorocarbon resin layer, a polydiallyl isophthalate layer, a polyvinylidene fluoride layer, a polyethylene layer, a polytetrafluoroethylene layer, etc. Vinyl layer, fluorocarbon resin modified polymer layer, polydiallyl isophthalate modified polymer layer, polyvinylidene fluoride modified polymer layer, polyethylene modified polymer layer, polytetrafluoroethylene modified At least one of the permanent polymer layer and the white silicone layer, which has the characteristics of high reflectivity and excellent aging resistance. The reflective coating 2 is closely adhered to one side of the transparent layer through processes including but not limited to spraying, coating, printing and the like.

As shown in FIG. 2 and FIG. 8 , the junction box 4 is engaged with the outer edge of the body 1 and sealed with the frame 6 by glue. Thus, the junction box 3 is installed on the edge of the battery assembly instead of opening holes or grooves on the back of the assembly, maintaining the integrity of the second glass layer 15 without forming stress concentration points, and having higher safety. In addition, the distribution of the junction box 3 can reduce the length of the internal bus bars and external cables of the assembly compared with the traditional assembly, save costs, and reduce resistance and increase power output. Optionally, a side of the junction box 4 facing the body 1 is provided with two engaging feet (not shown in the figure), and the two engaging feet are respectively engaged at the outer edge of the body 1 . Further, in an optional example, the junction box 4 is glued on the first glass layer 11 and the second glass layer 15 of the body 1 .

According to one embodiment of the present utility model, as shown in FIG. 2 , the body 1 is formed into a rectangle, and there are three junction boxes 4 spaced apart from each other and arranged on one of the short sides of the body 1 , every adjacent two junction boxes 4 are connected by a packaging connector 8, which encapsulates the outer edge of the body 1 corresponding to the notch 60, so that the packaging connector 8 and the frame 6 jointly protect the edge of the body 1. In comparison, the outer edges of traditional battery components are usually not protected or only protected with tape. The components of this structure are easily broken due to the force at the corners of the tempered glass, which has low safety and risks during transportation and installation. larger. However, after the double-glass photovoltaic cell assembly according to the embodiment of the present invention is protected by a U-shaped rigid frame and packaging connector 8, the impact resistance of the edges and four corners of the cell assembly has been greatly improved, and the stability of the cell assembly has been further strengthened. Sealing effect.

In this embodiment, the frame 6 and the packaging connector 8 can be made of various materials respectively. Wherein, in an optional example, the frame 6 is made of aluminum, and the packaging connector 8 is an insulating part. In this case, the frame 6 needs to have a grounding hole 64 . In another optional example, both the frame 6 and the package connector 8 are made of aluminum, and a ground hole 64 may be provided on the package connector 8 between every two adjacent junction boxes 4 . Certainly, the present invention is not limited thereto, and both the frame 6 and the packaging connector 8 may be insulators. In this case, neither the frame 6 nor the packaging connector 8 need to be provided with grounding holes 64 .

The structure of the junction box 4 of this embodiment will be specifically described below. The junction box 4 includes: a box body 41a, at least two partitions 42a, a conductive block 43a, a diode 44a and a connector 45a. As shown in Figure 6, there is a chamber 410 inside the box body 41a, and a plurality of threading holes 411 are provided on the side wall of the chamber 410, and the bus bars 131 drawn from the cells in the photovoltaic module are suitable to enter the chamber 410 through the threading holes 411 Inside, as shown in Figure 6 and Figure 7b. At least two partitions 42a are provided in the chamber 410 to divide the chamber 410 into at least three sub-chambers. For example, the partitions 42a can be plastic parts. Threading holes 411 are provided on the side walls of the two outermost sub-chambers among the at least three sub-chambers. Optionally, the threading hole 411 is a rectangular hole, as shown in FIG. 7b.

The conductive block 43a is disposed in the chamber 410 and runs through at least three sub-chambers, which increases the length of the conductive block 43a. The bus bar 131 is adapted to be welded and connected to the conductive block 43a so as to lead out the energy of the battery sheet. The diode 44a is arranged in the middle sub-chamber among the at least three sub-chambers, so as to prevent the cells from burning out when encountering the hot spot effect, and prevent the current from flowing backward when there is no light. The diode 44a is electrically connected to the conductive block 43a, preferably, the diode 44a is welded to the conductive block 43a. The connector 45a is located outside the box body 41a and is connected to the conductive block 43a through a cable 46a.

Thus, according to the junction box 4 of the embodiment of the present utility model, the chamber 410 is divided into a plurality of subchambers by the partition plate 42a, and the diode 44a is arranged in the middle subchamber. When welding the bus bar 131, the welding at the diode 44a place The place will not melt, avoiding the diode desoldering. In addition, when the diode 44a fails or the junction box 4 fails, only the bus bar 131 needs to be soldered off, or the bus bar 131 can be removed from the wiring hole 411 to remove the junction box. The operation is simple and time-saving, which is convenient for power station maintenance and prolongs the life of components . Further optionally, the double-glass photovoltaic module according to this embodiment may also include a patch-type thin-film diode 9, and the thin-film diode 9 is welded on the bus bar 131 and laminated between the first glass layer 11 and the second glass layer 15 , so that it prevents the battery from burning out when encountering the hot spot effect, and prevents the current from flowing backward when there is no light.

According to a preferred example of the present utility model, the number of partitions 42a is two, and the two partitions 42a divide the chamber 410 into three subchambers, namely the first subchamber 401a, the second subchamber 402a and the second subchamber 402a. The third subchamber 403a, wherein the diode 44a is arranged in the middlemost subchamber 402a, as shown in FIG. 6 . The sub-chamber where the diode 44a is located, that is, the second sub-chamber 402a is sealed by potting glue. Thus, the encapsulant with good thermal conductivity can be kept around the diode 44a, and the temperature of the diode can be lowered in time to protect the diode. Optionally, the first sub-chamber 401a and the third sub-chamber 403a may maintain cavities, or may be filled with potting glue.

Optionally, the box body 41a includes a box seat and a box cover (not shown in the figure) that are engaged with each other, and the box cover and the box seat are sealed by butyl rubber, so as to ensure the waterproofness of the junction box.

The following describes in detail the installation process of the junction box according to the embodiment of the present invention with reference to FIG. 6 , taking the welding of the bus bar 131 and the conductive block 43 a as an example for illustration.

As shown in FIG. 6, the bus bar 131 drawn from the battery sheet in the photovoltaic module extends into the first subchamber 401a and the third subchamber 403a through the threading hole 411. As shown in FIG. 6, in the first subchamber When the solder reserved in the cavity 401a and the third sub-cavity 403a is heated, the bus bar 131 is welded to the conductive block 43a. Finally, the potting compound is injected into the second sub-chamber 402a where the diode 44a is located, thus completing the installation of the junction box.

According to the junction box of the embodiment of the utility model, the problems that the existing junction box is difficult to replace and the diodes are easily desoldered due to welding the bus bar are solved, the service life is extended, and a 40-year ultra-long warranty can be realized.

As shown in Figure 6, according to another embodiment of the utility model, the double-glass photovoltaic cell assembly includes a patch-type thin-film diode 9, and the thin-film diode 9 is welded on the bus bar 131 and laminated on the first glass layer 11 and the second glass layer. Between the glass layers 15, it is possible to prevent the battery sheet from being burnt when encountering the hot spot effect, and to prevent the current from flowing back when there is no light. At this time, there are two junction boxes 4 and they are respectively formed in an L shape. The junction boxes 4 are arranged at two adjacent corners of the body 1 , and the bus bars 131 extend into the junction boxes 4 to extract the energy of the battery slices. Specifically, when laying the battery slice matrix in the battery slice group layer, the thin chip diode 9 is directly welded to the bus bar 131, and the bus bar 131 is drawn from both ends and welded to the positive and negative connections at the two corners of the main body 1 respectively. box, as shown in Figure 8-10. Optionally, the side length of the chip diode 9 is 8-12 mm.

Optionally, the material of the junction box 4 can be ceramics, which can improve the resistance to the environment. Of course, the material of the junction box 4 can also be plastic.

In one optional example, the thickness H of the diode 9 is less than 0.8 mm, otherwise it would bear against the first glass layer 11 and the second glass layer 15 above and below it. In another optional example of the present utility model, the thickness H of the diode 9 is 0.8-2 mm, at this time, a receiving groove 16 is formed on at least one of the opposite sides of the first glass layer 11 and the second glass layer 15 , The total depth h=H-0.8mm of the accommodation groove 16. That is to say, if one of the first glass layer 11 and the second glass layer 15 is provided with an accommodating groove 16, the depth of the accommodating groove is h=H-0.8mm; if the first glass layer 11 and the second glass layer When the glass layer 15 has corresponding accommodation grooves 16, the total depth of the two accommodation grooves is h=H-0.8mm. Optionally, as shown in FIG. 6 , the receiving groove 16 is formed on the second glass layer 15 .

Preferably, the receiving groove 16 is a square groove, and the side length of the receiving groove 16 is 0.2 mm longer than the side of the diode 9 . In this way, the diode 9 is basically in close contact with the first glass layer 11 and the second glass layer 15 above and below it, so that the heat generated by the diode 9 can be quickly conducted away.

Specifically, the junction box 4 includes: a box body 41b, a conductive sheet 42b and a plug connector 43b. The box body 41b has a chamber 410b inside, and the side wall of the chamber 410b has a threading hole 411b (as shown in FIG. 5 ), which can Optionally, the threading hole 11 is a rectangular hole. The conductive sheet 42b is arranged in the cavity 410b, wherein the bus bar 131 extends into the cavity 410b through the threading hole 411b and is connected to the conductive sheet 42b, and the plug connector 43b is located outside the box body 41b and connected to the conductive block through the cable 44b . Optionally, the bus bar 131 and the conductive strip 42b may be soldered or snapped.

According to the double-glass photovoltaic cell assembly of the embodiment of the present invention, the problems that the existing junction box is difficult to replace and the diodes are easily desoldered by welding the bus bar are solved, and the service life is prolonged. In addition, the junction box is easy to install, requires fewer cables and bus bars, reduces resistance and increases power output.

In the double-glass photovoltaic cell assembly according to some embodiments of the present invention, the end sealing block 3 can be a butyl rubber or a polyisobutylene rubber, or an adhesive with a water vapor transmission rate lower than 0.01g/m2/day , so as to make up for the shortage of the traditional photovoltaic module edge that exposes the packaging material, combined with the upper and lower dense first glass layer 11 and second glass layer 15, it can well prevent water vapor and corrosive gases in the environment from entering the module Internally, slows component decay and prolongs component life. Therefore, the double-glass battery assembly according to the present invention has good weather resistance, high structural strength, long service life, and high absorption rate of ultraviolet rays. Of course, the assembly can also be sealed without using the sealing block 3 .

In a further embodiment, the double-glass photovoltaic cell assembly according to the present invention may also include a plurality of fixing devices 5, and the plurality of fixing devices 5 are arranged on the surface of the second glass layer 15 away from the battery sheet group layer 13 , for installing the entire battery assembly somewhere through the fixing device 5 . Specifically, as shown in Figure 2, the back of the battery assembly uses high-strength adhesive glue to bond four fixing devices 5, so that the fixing device 5 can be fixed on the bracket (not shown in the figure) for fixing the battery assembly by screws. out) on. This way of installation ensures that the battery components are more evenly stressed, enhances the load-bearing capacity of the components, and is safer and more reliable.

As shown in FIG. 2 , the fixing device 5 is provided with a positioning piece for fixing the double-glass battery assembly on the external carrier. Optionally, there are four fixing devices 5 and they are evenly distributed on the surface of the second glass layer 15 , that is, the back of the entire battery assembly. Thus, the entire battery assembly can be conveniently installed on a certain installation surface or installation bracket (not shown in the figure).

Furthermore, in some embodiments, the first encapsulation layer 12 and the second encapsulation layer 14 are transparent silicone layers or polyolefin layers. Therefore, compared with the traditional EVA packaging film, its advantage is that it can pass through the ultraviolet light absorbed by the EVA ultraviolet absorber, convert it into electrical energy, and increase the output of the photovoltaic module; It is very stable under the environment, will not degrade and produce small molecules such as acetic acid, which will corrode the battery sheet, and has better weather resistance. Specifically, transparent silica gel is a film-like structure, which is thermoplastic, solid at room temperature, and gradually softens when the temperature rises. Transparent liquid silicone is a two-component silicone, which is liquid at room temperature. The two components are evenly mixed at a ratio of 1:1 and then laminated at 50-130 ° C. It can be cured into thermosetting transparent silicone. The lamination temperature is low and saves energy. , and helps to prolong the life of the laminator. Both the backsheet and the frontsheet of the double-glass module are rigid glass, which is easier to glue and laminate than the conventional backsheet of polymer materials. When the first encapsulation layer 12 and the second encapsulation layer 14 are polyolefin layers, thermoset polyolefin or thermoplastic polyolefin. The temperature of the component may reach 80-100°C during actual use, and the thermoplastic film will soften and have a certain fluidity, while the thermosetting film will not have this problem, and the temperature resistance of the component is higher.

According to the utility model, the double-glass photovoltaic cell assembly has good weather resistance, high structural strength, long service life and high ultraviolet absorption rate.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation Specific features, structures, materials or characteristics described in an embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (14)

1. for a frame for two glass photovoltaic cell components, it is characterized in that, described frame is the one frame that a package strip is bent to form, and described frame is formed as frame structure, and the cross section of described frame has U-lag.

2. the frame for two glass photovoltaic cell components according to claim 1, is characterized in that, described package strip has at least two predetermined crooked place, forms the V-shaped groove of 90 degree at each predetermined crooked place place.

3. the frame for two glass photovoltaic cell components according to claim 1, is characterized in that, the thickness of described frame is 1-2mm.

4. the frame for two glass photovoltaic cell components according to claim 1, is characterized in that, on the outer surface of described frame, is formed with raised line.

5. the frame for two glass photovoltaic cell components according to claim 4, is characterized in that, described raised line extends along the length direction of described frame.

6. the frame for two glass photovoltaic cell components according to claim 5, is characterized in that, described raised line extends along length direction straight line or the curve of described frame.

7. two glass photovoltaic cell components, is characterized in that, comprising:

Body, described body comprise the first glassy layer of being cascading, the first encapsulated layer, cell piece group layer,

The second encapsulated layer and the second glassy layer;

According to the frame described in any one in claim 1-6, the outward flange of described frame encapsulation main body, and the thickness that the width of rebate of the described U-lag of described frame is greater than described body is to cover on the outward flange of described body.

8. according to claim 7 pair of glass photovoltaic cell component, is characterized in that, described frame is located on the neighboring of described photovoltaic cell component by fluid sealant.

9. according to claim 7 pair of glass photovoltaic cell component, is characterized in that, on described frame, ground hole is set.

10. according to claim 9 pair of glass photovoltaic cell component, is characterized in that, the diameter of described ground hole is 2-4mm.

11. according to claim 7 pairs of glass photovoltaic cell components, is characterized in that, described frame is aluminium part.

12. according to claim 7 pairs of glass photovoltaic cell components, is characterized in that, described the first encapsulated layer and the second encapsulated layer are transparent silicon glue-line or polyolefin layer.

13. according to claim 7 pairs of glass photovoltaic cell components, is characterized in that, also comprise reflecting coating, described reflecting coating be located at described the second glassy layer on a side surface of described cell piece group layer.

14. according to claim 7 pairs of glass photovoltaic cell components, is characterized in that, the outward flange of described the first glassy layer and described the second glassy layer exceedes the outward flange of described the first encapsulated layer, cell piece group layer and the second encapsulated layer;

Described pair of glass photovoltaic cell component also comprises:

End part seal piece, described end part seal piece is located between described the first glassy layer and described the second glassy layer, and described end part seal piece is positioned at the periphery of the first encapsulated layer/cell piece group layer/the second encapsulated layer.